INTEGRATION: CWS canvas02 (1.1.2); FILE ADDED

2005/10/11 15:41:09 thb 1.1.2.2: #i54170# Corrected license headers
2005/08/19 11:03:12 thb 1.1.2.1: #i53538# Added null canvas. This canvas will do nothing, except log all operations (to stderr, currently, but planned are various targets)

1 files changed, 84 insertions, 0 deletions

diff --git a/canvas/source/null/null_usagecounter.hxx b/canvas/source/null/null_usagecounter.hxx
new file mode 100644
index 000000000000..2d2e35ad6a91
--- /dev/null
+++ b/canvas/source/null/null_usagecounter.hxx
@@ -0,0 +1,84 @@
+/*************************************************************************
+ *
+ *  OpenOffice.org - a multi-platform office productivity suite
+ *
+ *  $RCSfile: null_usagecounter.hxx,v $
+ *
+ *  $Revision: 1.2 $
+ *
+ *  last change: $Author: kz $ $Date: 2005-11-02 12:51:13 $
+ *
+ *  The Contents of this file are made available subject to
+ *  the terms of GNU Lesser General Public License Version 2.1.
+ *
+ *
+ *    GNU Lesser General Public License Version 2.1
+ *    =============================================
+ *    Copyright 2005 by Sun Microsystems, Inc.
+ *    901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *    This library is free software; you can redistribute it and/or
+ *    modify it under the terms of the GNU Lesser General Public
+ *    License version 2.1, as published by the Free Software Foundation.
+ *
+ *    This library is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *    Lesser General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Lesser General Public
+ *    License along with this library; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *    MA  02111-1307  USA
+ *
+ ************************************************************************/
+
+#ifndef _NULLCANVAS_USAGECOUNTER_HXX
+#define _NULLCANVAS_USAGECOUNTER_HXX
+
+#include <osl/interlck.h>
+#include <boost/current_function.hpp>
+
+namespace nullcanvas
+{
+    /** Little resource tracking counter.
+
+        When using this object, a global use counter, specific to the
+        given type is incremented on object construction, and
+        decremented on object destruction.
+     */
+    template< class Type > class UsageCounter
+    {
+    public:
+        UsageCounter()
+        {
+            OSL_TRACE( "%s, %d objects currently in use.\n",
+                       BOOST_CURRENT_FUNCTION,
+                       osl_incrementInterlockedCount( &s_nCount ) );
+        }
+
+        ~UsageCounter()
+        {
+            const sal_Int32 nCount( osl_decrementInterlockedCount( &s_nCount ) );
+
+            if( !nCount )
+            {
+                OSL_TRACE( "%s, last instance deleted.\n",
+                           BOOST_CURRENT_FUNCTION );
+            }
+            else
+            {
+                OSL_TRACE( "%s, %d instances left.\n",
+                           BOOST_CURRENT_FUNCTION,
+                           nCount );
+            }
+        }
+
+    private:
+        static oslInterlockedCount s_nCount;
+    };
+
+    template< class Type > oslInterlockedCount UsageCounter<Type>::s_nCount = 0;
+}
+
+#endif /* _NULLCANVAS_USAGECOUNTER_HXX */